U.S. patent number 11,202,304 [Application Number 16/125,610] was granted by the patent office on 2021-12-14 for apparatus and method for transmitting uplink signals in wireless communication system.
This patent grant is currently assigned to Samsung Electronics Co., Ltd.. The grantee listed for this patent is Samsung Electronics Co., Ltd. Invention is credited to Sungnam Hong, Chanhong Kim, Taeyoung Kim, Yongok Kim, Jongbu Lim, Yeohun Yun.
United States Patent |
11,202,304 |
Yun , et al. |
December 14, 2021 |
Apparatus and method for transmitting uplink signals in wireless
communication system
Abstract
A communication method and system for converging a fifth
generation (5G) communication system for supporting higher data
rates beyond a fourth generation (4G) system with a technology for
internet of things (IoT) includes intelligent services based on the
5G communication technology and the IoT-related technology. A
method by a terminal for transmitting uplink data in a wireless
communication system comprises receiving downlink control
information for scheduling of uplink transmission in a cell from a
base station and transmitting the uplink data to the base station
on the supplementary uplink if the indicator indicates the
scheduling of the uplink transmission is associated with the
supplementary uplink in the cell. The downlink control information
includes an indicator indicating whether the scheduling of the
uplink transmission is associated with a supplementary uplink in
the cell.
Inventors: |
Yun; Yeohun (Hwaseong-si,
KR), Kim; Yongok (Seoul, KR), Kim;
Chanhong (Suwon-si, KR), Lim; Jongbu (Seoul,
KR), Hong; Sungnam (Suwon-si, KR), Kim;
Taeyoung (Seoul, KR) |
Applicant: |
Name |
City |
State |
Country |
Type |
Samsung Electronics Co., Ltd |
Suwon-si |
N/A |
KR |
|
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Assignee: |
Samsung Electronics Co., Ltd.
(Suwon-si, KR)
|
Family
ID: |
1000005991255 |
Appl.
No.: |
16/125,610 |
Filed: |
September 7, 2018 |
Prior Publication Data
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|
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Document
Identifier |
Publication Date |
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US 20190082451 A1 |
Mar 14, 2019 |
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Foreign Application Priority Data
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Sep 8, 2017 [KR] |
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10-2017-0115402 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04W
72/1268 (20130101); H04W 74/0833 (20130101); H04W
72/1289 (20130101); H04L 5/0053 (20130101); H04L
5/1469 (20130101); H04W 84/042 (20130101); H04W
74/006 (20130101); H04W 4/70 (20180201) |
Current International
Class: |
H04W
72/12 (20090101); H04L 5/00 (20060101); H04W
74/08 (20090101); H04W 84/04 (20090101); H04W
74/00 (20090101); H04L 5/14 (20060101); H04W
4/70 (20180101) |
Field of
Search: |
;370/329 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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2689622 |
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Jan 2014 |
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EP |
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2016062055 |
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Apr 2016 |
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WO |
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2018/226026 |
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Dec 2018 |
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WO |
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Other References
ISA/KR, International Search Report for International Application
No. PCT/KR2018/010495 dated Dec. 7, 2018, 3 pages. cited by
applicant .
CMCC, "Considerations on support of supplementary uplink
frequency," R2-1709093, 3GPP TSG-RAN WG2 Meeting #99, Berlin,
Germany, Aug. 21-25, 2017, 5 pages. cited by applicant .
Mediatek Inc., "Support Initial Access on Supplementary Uplink,"
R2-1708050, 3GPP TSG-RAN WG2 Meeting #99, Berlin, Germany, Aug.
21-25, 2017, 4 pages. cited by applicant .
Samsung, "On supporting the supplementary uplink frequency,"
R2-1708895, 3GPP TSG-RAN WG2 Meeting #99, Berlin, Germany, Aug.
21-25, 2017, 3 pages. cited by applicant .
Huawei et al., "Initial access and uplink operations with SUL",
3GPP TSG RAN WG1 Meeting #90, Aug. 21-25, 2017, R1-1712165, 6
pages. cited by applicant .
LG Electronics, "Remaining details on UL sharing between LTE and
NR", 3GPP TSG RAN WG1 Meeting Ad-Hoc, Jun. 27-30, 2017, R1-1710354,
6 pages. cited by applicant .
Supplementary European Search Report dated Jul. 17, 2020 in
connection with European Patent Application No. 18 85 4584, 9
pages. cited by applicant.
|
Primary Examiner: Kumar; Pankaj
Assistant Examiner: Detse; Kokou R
Claims
What is claimed is:
1. A method performed by a terminal for transmitting uplink data in
a wireless communication system, the method comprising: receiving,
from a base station, downlink control information for scheduling of
uplink transmission in a cell, wherein the downlink control
information includes an indicator indicating whether the scheduling
of the uplink transmission is associated with a non-supplementary
uplink or a supplementary uplink in the cell, and a size of the
indicator is 1 bit; identifying whether the indicator indicates
that the scheduling of the uplink transmission is associated with
the non-supplementary uplink or the supplementary uplink in the
cell; and transmitting, to the base station, the uplink
transmission on the supplementary uplink in case that the indicator
indicates that the scheduling of the uplink transmission is
associated with the supplementary uplink in the cell.
2. The method of claim 1, further comprising: transmitting, to the
base station, the uplink transmission on the non-supplementary
uplink in the cell in case that the indicator indicates that the
scheduling of the uplink transmission is associated with the
non-supplementary uplink in the cell.
3. The method of claim 1, the method further comprising: receiving,
from the base station, random access channel (RACH) configuration
information for the supplementary uplink in system information;
determining whether to perform a random access (RA) procedure on
the supplementary uplink based on the RACH configuration
information; and transmitting, to the base station, an RA preamble
on the supplementary uplink in case that the RA procedure is
determined to be performed on the supplementary uplink.
4. A method performed by a base station for receiving uplink data
in a wireless communication system, the method comprising:
identifying whether to schedule uplink transmission for a terminal
on a non-supplementary uplink or a supplementary uplink in a cell;
transmitting, to the terminal, downlink control information for the
scheduling of the uplink transmission in the cell, wherein the
downlink control information includes an indicator indicating
whether the scheduling of the uplink transmission is associated
with the non-supplementary uplink or the supplementary uplink in
the cell, and a size of the indicator is 1 bit; and receiving, from
the terminal, the uplink data on the supplementary uplink in case
that the scheduling of the uplink transmission is associated with
the supplementary uplink.
5. The method of claim 4, further comprising: receiving, from the
terminal, the uplink data on the non-supplementary uplink in the
cell in case that downlink the scheduling of the uplink
transmission is associated with the non-supplementary uplink.
6. The method of claim 4, further comprising: transmitting, to the
terminal, random access channel (RACH) configuration information
for the supplementary uplink in system information.
7. The method of claim 6, further comprising; receiving, from the
terminal, a random access (RA) preamble on the supplementary uplink
in case that an RA procedure is determined to be performed on the
supplementary uplink based on the RACH configuration
information.
8. A terminal in a wireless communication system, the terminal
comprising: a transceiver configured to: receive signals from a
base station, and transmit signals to the base station; and a
controller coupled with the transceiver and configured to: control
the transceiver to receive downlink control information for
scheduling of uplink transmission in a cell from the base station,
wherein the downlink control information includes an indicator
indicating whether the scheduling of the uplink transmission is
associated with a non-supplementary uplink or a supplementary
uplink in the cell, and a size of the indicator is 1 bit, identify
whether the indicator indicates that the scheduling of the uplink
transmission is associated with the non-supplementary uplink or the
supplementary uplink in the cell, and control the transceiver to
transmit the uplink transmission to the base station on the
supplementary uplink in case that the indicator indicates that the
scheduling of the uplink transmission is associated with the
supplementary uplink in the cell.
9. The terminal of claim 8, wherein the controller is further
configured to control the transceiver to transmit the uplink
transmission to the base station on the non-supplementary uplink in
the cell in case that the indicator indicates that the scheduling
of the uplink transmission is associated with the non-supplementary
uplink in the cell.
10. The terminal of claim 8, wherein the controller is further
configured to: control the transceiver to receive random access
channel (RACH) configuration information for the supplementary
uplink in system information from the base station, determine
whether to perform a random access (RA) procedure on the
supplementary uplink based on the RACH configuration information,
and control the transceiver to transmit an RA preamble to the base
station on the supplementary uplink in case that the RA procedure
is determined to be performed on the supplementary uplink.
11. A base station in a wireless communication system, the base
station comprising: a transceiver configured to: receive signals
from a terminal, and transmit signals to the terminal; and a
controller coupled with the transceiver and configured to: identify
whether to schedule uplink transmission for the terminal on a
non-supplementary uplink or a supplementary uplink in a cell,
control the transceiver to transmit downlink control information
for the scheduling of the uplink transmission in the cell to the
terminal, wherein the downlink control information includes an
indicator indicating whether the scheduling of the uplink
transmission is associated with the non-supplementary uplink or the
supplementary uplink in the cell, and a size of the indicator is 1
bit, and control the transceiver to receive the uplink transmission
from the terminal on the supplementary uplink in case that the
scheduling of the uplink transmission is associated with the
supplementary uplink in the cell.
12. The base station of claim 11, wherein the controller is further
configured to control the transceiver to receive the uplink
transmission from the terminal on the non-supplementary uplink in
the cell in case that the scheduling of the uplink transmission is
associated with the non-supplementary uplink.
13. The base station of claim 11, wherein the controller is further
configured to transmit random access channel (RACH) configuration
information for the supplementary uplink in system information to
the terminal.
14. The base station of claim 13, wherein the controller is further
configured to receive a random access (RA) preamble from the
terminal on the supplementary uplink in case that an RA procedure
is determined to be performed on the supplementary uplink based on
the RACH configuration information.
Description
CROSS-REFERENCE TO RELATED APPLICATION
This application is based on and claims priority under 35 U.S.C.
.sctn. 119(a) to Korean Patent Application No. 10-2017-0115402
filed on Sep. 8, 2017 in the Korean Intellectual Property Office,
the disclosure of which is incorporated herein by reference in its
entirety.
BACKGROUND
1. Field
Various embodiments of the present disclosure relate to an
apparatus and a method for transmitting and receiving data in a
wireless communication system, and more particularly, to an
apparatus and a method for transmitting and receiving data in a
wireless communication system having a plurality of uplinks.
2. Description of the Related Art
To meet the demand for wireless data traffic having increased since
deployment of fourth generation (4G) communication systems, efforts
have been made to develop an improved fifth generation (5G) or
pre-5G communication system. Therefore, the 5G or pre-5G
communication system is also called a `beyond 4G network` or a
`post long term evolution (LTE) System`. The 5G wireless
communication system is considered to be implemented not only in
lower frequency bands but also in higher frequency (mmWave) bands,
e.g., 10 GHz to 100 GHz bands, so as to accomplish higher data
rates. To mitigate propagation loss of the radio waves and increase
the transmission distance, the beamforming, massive multiple-input
multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array
antenna, an analog beam forming, and large scale antenna techniques
are being considered in the design of the 5G wireless communication
system. In addition, in 5G communication systems, development for
system network improvement is under way based on advanced small
cells, cloud radio access networks (RANs), ultra-dense networks,
device-to-device (D2D) communication, wireless backhaul, moving
network, cooperative communication, coordinated multi-points
(CoMP), reception-end interference cancellation and the like. In
the 5G system, hybrid frequency shift keying (FSK) and quadrature
amplitude modulation (QAM) (FQAM) and sliding window superposition
coding (SWSC) as an advanced coding modulation (ACM), filter bank
multi carrier (FBMC), non-orthogonal multiple access (NOMA), and
sparse code multiple access (SCMA) as an advanced access technology
have been developed.
The Internet, which is a human centered connectivity network where
humans generate and consume information, is now evolving to the
internet of things (IoT) where distributed entities, such as
things, exchange and process information without human
intervention. The Internet of everything (IoE), which is a
combination of the IoT technology and the big data processing
technology through connection with a cloud server, has emerged. As
technology elements, such as "sensing technology", "wired/wireless
communication and network infrastructure", "service interface
technology", and "security technology" have been demanded for IoT
implementation, a sensor network, a machine-to-machine (M2M)
communication, machine type communication (MTC), and so forth have
been recently researched. Such an IoT environment may provide
intelligent Internet technology services that create a new value to
human life by collecting and analyzing data generated among
connected things. IoT may be applied to a variety of fields
including smart home, smart building, smart city, smart car or
connected cars, smart grid, health care, smart appliances and
advanced medical services through convergence and combination
between existing information technology (IT) and various industrial
applications.
In line with this, various attempts have been made to apply 5G
communication systems to IoT networks. For example, technologies,
such as a sensor network, MTC, and M2M communication may be
implemented by beamforming, MIMO, and array antennas. Application
of a cloud RAN as the above-described big data processing
technology may also be considered to be as an example of
convergence between the 5G technology and the IoT technology.
In a 5G communication system, a high frequency band and a low
frequency band are all considered in terms of frequency, as the 5G
communication system covers a wide range of frequency bands.
However, in the high frequency band, the coverage thereof is
reduced because, in the high frequency band, a propagation loss
(path loss) is increased due to channel characteristics. The
disadvantage is a kind of constraint that makes it difficult for
existing LTE operators to place new radio (NR) base stations at the
same locations as those of existing LTE base stations. One way to
overcome the problem is to arrange additional uplinks in the low
frequency band so as to ensure the coverage, since the coverage of
the uplink is generally affected. In other words, an uplink and a
downlink are arranged in the high frequency band using a time
division duplex (TDD) and an uplink is additionally arranged in the
low frequency band using a frequency division duplex (FDD). As
described above, the arrangement of only the uplink without being
paired with the downlink is referred to as a supplementary uplink
(SUL). When the supplementary uplink is added in this way, an
initial access procedure of a terminal considering the above, a
method for transmitting and receiving data and control signals
after the initial access, and the like should be supported.
SUMMARY
Accordingly, an object of the present disclosure is directed to
provision of an efficient method and apparatus for an initial
access procedure of a terminal in a system having a plurality of
uplinks.
Another object of the present disclosure is directed to provision
of an efficient transmission and reception method and apparatus
after the initial access considering capability that a receiver or
a terminal can provide.
In accordance with a first aspect of the disclosure, a method by a
terminal for transmitting uplink data in a wireless communication
system is provided. The method comprises receiving downlink control
information for scheduling of uplink transmission in a cell from a
base station and transmitting the uplink data to the base station
on the supplementary uplink if the indicator indicates that the
scheduling of the uplink transmission is associated with the
supplementary uplink in the cell. The downlink control information
includes an indicator indicating whether the scheduling of the
uplink transmission is associated with a supplementary uplink in
the cell.
In accordance with a second aspect of the disclosure, a method by a
base station for receiving uplink data in a wireless communication
system is provided. The base station comprises transmitting
downlink control information for scheduling of uplink transmission
in a cell to a terminal and receiving the uplink data from the
terminal on the supplementary uplink. The downlink control
information includes indicator indicating that the scheduling of
the uplink transmission is associated with a supplementary uplink
in the cell.
In accordance with a third aspect of the disclosure, a terminal for
transmitting uplink data in a wireless communication system is
provided. The terminal comprises a transceiver configured to
receive signals from a base station and transmit signals to the
base station, and a controller coupled with the transceiver. The
controller is configured to control the transceiver to receive
downlink control information for scheduling of uplink transmission
in a cell from the base station and transmit the uplink data to the
base station on the supplementary uplink if the indicator indicates
that the scheduling of the uplink transmission is associated with
the supplementary uplink in the cell. The downlink control
information includes indicator indicating that the scheduling of
the uplink transmission is associated with a supplementary uplink
in the cell.
In accordance with a fourth aspect of the disclosure, a base
station for receiving uplink data in a wireless communication
system is provided. The base station comprises a transceiver
configured to receive signals from a terminal and transmit signals
to the terminal, and a controller coupled with the transceiver. The
controller is configured to control to the transceiver to transmit
downlink control information for scheduling of uplink transmission
in a cell to the terminal and receive the uplink data from the
terminal on the supplementary uplink. The downlink control
information includes indicator indicating that the scheduling of
the uplink transmission is associated with a supplementary uplink
in the cell.
According to one embodiment of the present disclosure, in the
wireless communication system having a plurality of uplinks, an
initial random access channel (RACH) access can be efficiently
performed, and a successful access may be effectively achieved.
In addition, according to one embodiment of the present disclosure,
in the wireless communication system having a plurality of uplinks,
initial and subsequent RACH accesses can be efficiently performed
for each uplink transmission capability of the terminal, and the
effect of improving a transmission and reception efficiency can be
achieved by linking indication information transmitted at a
plurality of time points to perform the uplink transmission.
Before undertaking the DETAILED DESCRIPTION below, it may be
advantageous to set forth definitions of certain words and phrases
used throughout this patent document: the terms "include" and
"comprise," as well as derivatives thereof, mean inclusion without
limitation; the term "or," is inclusive, meaning and/or; the
phrases "associated with" and "associated therewith," as well as
derivatives thereof, may mean to include, be included within,
interconnect with, contain, be contained within, connect to or
with, couple to or with, be communicable with, cooperate with,
interleave, juxtapose, be proximate to, be bound to or with, have,
have a property of, or the like; and the term "controller" means
any device, system or part thereof that controls at least one
operation, such a device may be implemented in hardware, firmware
or software, or some combination of at least two of the same. It
should be noted that the functionality associated with any
particular controller may be centralized or distributed, whether
locally or remotely.
Moreover, various functions described below can be implemented or
supported by one or more computer programs, each of which is formed
from computer readable program code and embodied in a computer
readable medium. The terms "application" and "program" refer to one
or more computer programs, software components, sets of
instructions, procedures, functions, objects, classes, instances,
related data, or a portion thereof adapted for implementation in a
suitable computer readable program code. The phrase "computer
readable program code" includes any type of computer code,
including source code, object code, and executable code. The phrase
"computer readable medium" includes any type of medium capable of
being accessed by a computer, such as read only memory (ROM),
random access memory (RAM), a hard disk drive, a compact disc (CD),
a digital video disc (DVD), or any other type of memory. A
"non-transitory" computer readable medium excludes wired, wireless,
optical, or other communication links that transport transitory
electrical or other signals. A non-transitory computer readable
medium includes media where data can be permanently stored and
media where data can be stored and later overwritten, such as a
rewritable optical disc or an erasable memory device.
Definitions for certain words and phrases are provided throughout
this patent document. Those of ordinary skill in the art should
understand that in many, if not most instances, such definitions
apply to prior, as well as future uses of such defined words and
phrases.
BRIEF DESCRIPTION OF THE DRAWINGS
For a more complete understanding of the present disclosure and its
advantages, reference is now made to the following description
taken in conjunction with the accompanying drawings, in which like
reference numerals represent like parts:
FIG. 1 is a diagram illustrating a case where component carriers
include two supplementary uplinks, a frequency division duplex
(FDD) uplink/downlink and two time division duplex (TDD)
uplink/downlinks;
FIG. 2 is a diagram illustrating an example of assigning an ID of a
supplementary uplink according to one embodiment of the present
disclosure, where, when the ID of the supplementary uplink is
transmitted in RMSI, the ID is assigned;
FIG. 3 is a diagram illustrating a method of assigning IDs to
supplementary uplinks in which a terminal performs the random
access using a Msg2 or a Msg4, according to one embodiment of the
present disclosure;
FIG. 4 is a diagram illustrating an example of a method for
distinguishing the supplementary uplink component carrier from the
component carrier, according to one embodiment of the present
disclosure;
FIG. 5 is a diagram illustrating an example of a supplementary
uplink component carrier indication field and a component carrier
indication field, according to one embodiment of the present
disclosure;
FIG. 6 is a diagram illustrating an example of the supplementary
uplink component carrier indication field and the component carrier
indication field when there are the plurality of supplementary
uplinks, according to one embodiment of the present disclosure;
FIG. 7 is a diagram illustrating an example of transmitting the
physical cell ID of the supplementary uplinks in the remaining
system information (RMSI), according to one embodiment of the
present disclosure;
FIG. 8 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure;
FIG. 9 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure;
FIG. 10 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure;
FIG. 11 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure;
FIG. 12 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure;
FIG. 13 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure;
FIG. 14 is a flowchart illustrating a method by a terminal for
transmitting uplink data in a wireless communication system
according to an embodiment of the disclosure;
FIG. 15 is a flowchart illustrating a method by a base station for
receiving uplink data in a wireless communication system according
to an embodiment of the disclosure;
FIG. 16 is a block diagram of a terminal according to an embodiment
of the disclosure; and
FIG. 17 is a block diagram of a base station according to an
embodiment of the disclosure.
Throughout the drawings, like reference numerals will be understood
to refer to like parts, components, and structures.
DETAILED DESCRIPTION
FIGS. 1 through 17, discussed below, and the various embodiments
used to describe the principles of the present disclosure in this
patent document are by way of illustration only and should not be
construed in any way to limit the scope of the disclosure. Those
skilled in the art will understand that the principles of the
present disclosure may be implemented in any suitably arranged
system or device.
Hereafter, embodiments of the present disclosure will be described
in detail with reference to the accompanying drawings. When it is
decided that a detailed description for the known function or
configuration related to the present disclosure may obscure the
gist of the present disclosure, the detailed description therefor
will be omitted. Further, the following terminologies are defined
in consideration of the functions in the present disclosure and may
be construed in different ways by the intention or practice of
users and operators. Therefore, the definitions thereof should be
construed based on the contents throughout the specification.
Various advantages and features of the present disclosure and
methods accomplishing the same will become apparent from the
following detailed description of embodiments with reference to the
accompanying drawings. However, the present disclosure is not
limited to the embodiments disclosed herein but will be implemented
in various forms. The embodiments have made disclosure of the
present disclosure complete and are provided so that those skilled
in the art can easily understand the scope of the present
disclosure. Therefore, the present disclosure will be defined by
the scope of the appended claims. Like reference numerals
throughout the description denote like elements.
It is to be understood that the singular forms "a," "an," and "the"
include plural referents unless the context clearly dictates
otherwise. Thus, for example, reference to "a component surface"
includes reference to one or more of such surfaces.
By the term "substantially" it is meant that the recited
characteristic, parameter, or value need not be achieved exactly,
but that deviations or variations, including for example,
tolerances, measurement error, measurement accuracy limitations and
other factors known to those of skill in the art, may occur in
amounts that do not preclude the effect the characteristic was
intended to provide.
It is known to those skilled in the art that blocks of a flowchart
(or sequence diagram) and a combination of flowcharts may be
represented and executed by computer program instructions. These
computer program instructions may be loaded on a processor of a
general purpose computer, special purpose computer, or programmable
data processing equipment. When the loaded program instructions are
executed by the processor, they create a means for carrying out
functions described in the flowchart. Because the computer program
instructions may be stored in a computer readable memory that is
usable in a specialized computer or a programmable data processing
equipment, it is also possible to create articles of manufacture
that carry out functions described in the flowchart. Because the
computer program instructions may be loaded on a computer or a
programmable data processing equipment, when executed as processes,
they may carry out operations of functions described in the
flowchart.
A block of a flowchart may correspond to a module, a segment, or a
code containing one or more executable instructions implementing
one or more logical functions, or may correspond to a part thereof.
In some cases, functions described by blocks may be executed in an
order different from the listed order. For example, two blocks
listed in sequence may be executed at the same time or executed in
reverse order.
In this description, the words "unit", "module" or the like may
refer to a software component or hardware component, such as, for
example, a field-programmable gate array (FPGA) or an
application-specific integrated circuit (ASIC) capable of carrying
out a function or an operation. However, a "unit", or the like, is
not limited to hardware or software. A unit, or the like, may be
configured so as to reside in an addressable storage medium or to
drive one or more processors. Units, or the like, may refer to
software components, object-oriented software components, class
components, task components, processes, functions, attributes,
procedures, subroutines, program code segments, drivers, firmware,
microcode, circuits, data, databases, data structures, tables,
arrays or variables. A function provided by a component and unit
may be a combination of smaller components and units, and may be
combined with others to compose larger components and units.
Components and units may be configured to drive a device or one or
more processors in a secure multimedia card.
Prior to the detailed description, terms or definitions necessary
to understand the disclosure are described. However, these terms
should be construed in a non-limiting way.
The "base station (BS)" is an entity communicating with a user
equipment (UE) and may be referred to as BS, base transceiver
station (BTS), node B (NB), evolved NB (eNB), access point (AP), 5G
NB (5GNB), or gNB.
The "UE" is an entity communicating with a BS and may be referred
to as UE, device, mobile station (MS), mobile equipment (ME), or
terminal.
First, it is assumed that a base station transmits and receives
signals through a plurality of component carriers (CCs). Some of
the plurality of component carriers are composed of a supplementary
uplink having only an uplink and some are composed of uplink and
downlink pairs.
FIG. 1 is a diagram illustrating a case where component carriers
include two supplementary uplinks (101, 102), a frequency division
duplex (FDD) uplink/downlink (103) and two time division duplex
(TDD) uplink/downlinks (104, 105).
In an initial access, a terminal receives a synchronization signal
block in one of the component carriers having the downlink and
acquires a physical cell ID of the corresponding component carrier
based on the received synchronization signal block. The terminal
then receives remaining system information (RMSI), performs a
random access channel (RACH) operation based on RACH configuration
information in the supplementary uplinks received from the RMSI and
the uplink paired with the downlink where the synchronization
signal block is received, and terminates a radio resource control
(RRC) connection procedure after Msg5.
The terminal may perform the RACH operation through one of the
supplementary uplinks or one of the uplinks paired with the
downlink where the synchronization signal block is received. That
is, according to an embodiment of FIG. 1, the terminal may perform
an initial random access operation using any one of the component
carriers having three uplinks, i.e., two supplementary uplinks
(101, 102) and one uplink (one of 103, 104, 105) paired with the
downlink where the synchronization signal block is received. In the
operation, the base station may assign an ID to the supplementary
uplink having no downlink, and the following methods are
available.
1) When transmitting the RACH configuration information on the
supplementary uplinks in the RMSI, the ID corresponding to each
supplementary uplink is also transmitted.
2) When the terminal transmits a random access preamble in a random
access preamble message (hereinafter referred to as Msg1) based on
the RACH configuration information on the supplementary uplinks
included in the RMSI, the base station transmits the ID of the
supplementary uplink where the random access is performed to the
terminal in a random access preamble response message (hereinafter
referred to as Msg2) or the RRC connection setup message
(hereinafter referred to as Msg4).
Through the above operation, the base station and the terminal may
assign the ID to the supplementary uplink. The supplementary uplink
ID is an ID different from the physical cell ID. Therefore, the
physical cell ID of the terminal that performs the random access in
the supplementary uplink corresponds to the physical cell ID of the
component carrier with which the terminal is synchronized
irrespective of the supplementary uplink ID.
FIG. 2 is a diagram illustrating an example of assigning an ID of a
supplementary uplink according to one embodiment of the present
disclosure, where, when the ID of the supplementary uplink is
transmitted in RMSI, the ID is assigned.
The base station may transmit the ID of the supplementary uplink
included in the RMSI. In this case, the base station may inform the
terminal of all the IDs of the supplementary uplinks available to
the base station. Therefore, referring to FIG. 2, a SUL ID 1 and a
SUL ID 2 may be assigned to two supplementary uplinks (201, 202),
respectively, which may be IDs different from physical cell
identifiers.
Meanwhile, as described above, the ID of the supplementary uplink
may be transmitted to the terminal in the Msg2 or the Msg4, and
detailed description thereof will be described below.
FIG. 3 is a diagram illustrating a method of assigning IDs to
supplementary uplinks in which a terminal performs the random
access using a Msg2 or a Msg4, according to one embodiment of the
present disclosure.
Referring to FIG. 3, a base station may assign a SUL ID 1 to the
supplementary uplink in which the terminal performs the random
access. In this case, the base station may assign the ID of the
supplementary uplink (301) using the Msg2 or the Msg4, and may not
assign the ID to the supplementary uplink (302) in which the random
access is not performed.
Meanwhile, the terminal enters an `RRC-connected` state after the
initial random access operation. Then, when the base station
schedules supplementary uplink resources through a downlink primary
component carrier, it is possible to indicate which supplementary
uplink among the plurality of supplementary uplinks is scheduled
using the ID of the supplementary uplink.
The ID of the supplementary uplink may be informed based on a
supplementary uplink component carrier indication field (SUL-CIF)
and included in downlink control information (DCI) for scheduling
uplink resources.
In one embodiment of the present disclosure, when there is one
supplementary uplink for a terminal, a value `1` of SUL-CIF may
indicate scheduling to the supplementary uplink, and a value `0` of
SUL-CIF may indicate scheduling to the uplink paired with the
downlink of the primary component carrier.
FIG. 4 is a diagram illustrating an example of a method for
distinguishing the supplementary uplink component carrier from the
component carrier, according to one embodiment of the present
disclosure.
Referring to FIG. 4, there are SUL (401), SUL (402), NR FDD (403),
NR TDD1 (404) and NR TDD2 (405). When scheduling uplink resources
using a downlink control channel in NR TDD1 (404), NR FDD (403) and
NR TDD2 (405) may be distinguished from each other based on a
component carrier indication field (CIF), and two supplementary
uplinks (401, 402) may be distinguished from each other based on
the SUL-CIF.
FIG. 5 is a diagram illustrating an example of a supplementary
uplink component carrier indication field and a component carrier
indication field, according to one embodiment of the present
disclosure.
The example of FIG. 5 shows a case where a terminal to which a base
station is to schedule uplink resources has one supplementary
uplink and one secondary component carrier uplink. Since the
terminal has only one supplementary uplink, the base station may
transmit the supplementary uplink component carrier indication on
whether or not to be scheduled for the supplementary uplink in 1
bit. In addition, since the terminal has also only one secondary
component carrier, the base station may also transmit the component
carrier indication in 1 bit. For example, the base station may
configure a value `0` of CIF and a value `0` of SUL-CIF to indicate
that downlink control information transmitted on a downlink control
channel in a primary component carrier downlink is for scheduling a
primary component carrier uplink. The base station may configure a
value `1` of SUL-CIF to indicate that downlink control information
transmitted on a downlink control channel in a primary component
carrier downlink is for scheduling the supplementary uplink. The
base station may configure a value `1` of CIF to indicate downlink
control information transmitted on a downlink control channel in a
primary component carrier downlink is for scheduling a secondary
component carrier uplink. If the supplementary uplink is not
configured for the terminal in a cell, SUL-CIF may be not
configured, i.e., zero (0) bit of SUL-CIF may be configured.
Alternatively, the base station may pre-configure the length of the
supplementary uplink component carrier indication field to N bits,
and in this case, the base station may transmit the corresponding
information by 1 bit of the N bits. The base station may also
pre-configure the length of the component carrier indication field
to M bits, and in this case, the base station may transmit the
corresponding information in 1 bit of the M bits.
FIG. 6 is a diagram illustrating an example of the supplementary
uplink component carrier indication field and the component carrier
indication field when there are the plurality of supplementary
uplinks, according to one embodiment of the present disclosure. The
example of FIG. 6 shows a case where a terminal to which a base
station is to schedule uplink resources has three supplementary
uplinks and one secondary component carrier uplink. Since three
supplementary uplinks exist, the base station may use 2 bits of
SUL-CIF to indicate which supplementary uplink downlink among three
supplementary uplinks is scheduled in downlink control information
transmitted on a downlink control channel transmitted in a primary
component carrier downlink.
Next, a case where the supplementary uplink has an independent
physical cell ID is considered. The base station may also transmit
the physical cell ID corresponding to each supplementary uplink
when transmitting the RACH configuration information on the
supplementary uplinks in the RMSI. In one embodiment of the present
disclosure, when the supplementary uplink is the long term
evolution (LTE) band, the physical cell ID used in the
corresponding band of LTE may be also used in the supplementary
uplink of the new radio (NR). In contrast, a value different from
that of the LTE may be used.
FIG. 7 is a diagram illustrating an example of transmitting the
physical cell ID of the supplementary uplinks in the remaining
system information (RMSI), according to one embodiment of the
present disclosure.
Here, the physical cell ID of the supplementary uplinks may be
transmitted in the process of the terminal performing the random
access operation using the supplementary uplink. When the terminal
performs the random access, the base station may transmit the
physical cell ID of the supplementary uplink to the terminal in the
Msg2 or the Msg4.
Referring to FIG. 7, the physical cell ID (e.g., 400, 500) of the
supplementary uplinks (701, 702) in the present disclosure may be
transmitted in the Msg2 or the Msg4 during the random access
process.
Next, when the physical cell ID is assigned to the supplementary
uplink as described above, the following methods are available for
configuring a primary component carrier (PCC) and a secondary
component carrier (SCC) of the uplink.
1) Method 1: The supplementary uplink operates as the secondary
component carrier, and the uplink paired with the downlink carrier
where the synchronization signal block is received operates as the
primary component carrier.
In this case, even though the terminal performs the random access
process using the supplementary uplink and the RRC connection is
completed in the supplementary uplink, the supplementary uplink
operates as the secondary component carrier.
2) Method 2: The uplink where the terminal performs the random
access process is set as the primary component carrier.
In this case, the base station is aware of the location of the
primary component carrier of the terminal based on the location of
the random access Msg1 from the terminal. When the terminal
performs the random access using the supplementary uplink, the
supplementary uplink becomes an uplink primary component carrier,
and when the terminal performs the random access process using the
uplink paired with the downlink where the synchronization signal
block is received is performed, the paired uplink becomes the
uplink primary component carrier. Detailed descriptions thereof
will be described in FIG. 8.
FIG. 8 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure.
Referring to FIG. 8, the base station may receive the random access
signal (or random access preamble) from the terminal at operation
810. Then, the base station may check whether or not the received
random access signal is received in the supplementary uplink at
operation 820.
As the check result, if the random access signal is received in the
supplementary uplink, the base station may configure the primary
component carrier with the supplementary uplink at operation 830.
On the contrary, if the random access signal is not received in the
supplementary uplink, the base station may configure the primary
component carrier with the uplink paired with the downlink where
the synchronization signal block is received at operation 840.
3) Method 3: The terminal receives information on the presence of
the supplementary uplink in the RMSI, and when the terminal may
perform the random access using the supplementary uplink, the
terminal may inform the base station of the location of the uplink
primary component carrier using one of the Msg1, the Msg3, and the
Msg5 in the random access. The Msg3 may refer to an RRC connection
request message, and the Msg5 may refer to an RRC connection setup
complete message.
In this case, even though the terminal performs the random access
using the uplink paired with the downlink where the synchronization
signal block is received, the supplementary uplink may be
configured as the primary component carrier, and the base station
may be informed. On the contrary, even though the random access is
performed using the supplementary uplink, the uplink paired with
the downlink where the synchronization signal block is received may
be configured as the primary component carrier, and the base
station may be informed. The base station may go through the
process of approving the location of the primary component carrier
received from the terminal or may accept the location informed by
the terminal as it is. Detailed descriptions thereof will be
described in FIG. 9.
FIG. 9 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure.
Referring to FIG. 9, the base station may receive the Msg1, the
Msg3 or the Msg5 from the terminal, and then receive the primary
component carrier configuration information at operation 910.
Then, the base station may determine whether the supplementary
uplink is configured as the primary component carrier at operation
920. If the supplementary uplink is configured as the uplink
primary component carrier, the base station may configure the
primary component carrier with the supplementary uplink at
operation 930. On the contrary, if the supplementary uplink is not
configured as the primary component carrier, the base station may
configure the primary component carrier with the uplink paired with
the downlink where the synchronization signal block is received at
operation 940.
If the base station goes through the process of approving the
location of the primary component carrier, the following methods
are available.
3-1) Method 3-1: If the terminal informs the base station of
primary component carrier configuration information using the Msg1,
the base station may approve the location of the uplink primary
component carrier, or may indicate another location of the uplink
primary component carrier using the Msg2 (or Msg4).
FIG. 10 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure.
Referring to FIG. 10, the base station may receive the Msg1 from
the terminal and acquire uplink primary component carrier
configuration information at operation 1010.
Then, the base station may determine whether to approve the
configuration information of the uplink primary component carrier
received from the terminal, and may transmit the information
related to the approval or disapproval to the terminal at operation
1020. In this case, the base station may transmit the information
related to the approval or disapproval to the terminal in the Msg2
or the Msg4.
3-2) Method 3-2: If the terminal informs the base station of the
primary component carrier configuration information using the Msg3,
the base station may approve the location of the uplink primary
component carrier or indicate another location of the uplink
primary component carrier using the Msg4.
FIG. 11 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure.
Referring to FIG. 11, the base station may receive the Msg1 from
the terminal and acquire the uplink primary component carrier
configuration information at operation 1110.
Then, the base station may determine whether or not to approve the
configuration information of the uplink primary component carrier
received from the terminal, and may transmit the information
related to the approval or disapproval to the terminal at operation
1120. In this case, the base station may transmit the information
related to the approval or disapproval to the terminal in the
Msg4.
4) Method 4: The base station may acquire the supplementary uplink
capability of the terminal based on the random access Msg1, Msg3,
or Msg5 from the terminal, and may determine the uplink primary
component carrier to inform the terminal of the determined
result.
In this case, if the terminal transmits the random access Msg1 in
the supplementary uplink, the terminal may not explicitly inform
the base station of the supplementary uplink capability that the
terminal has. However, if the terminal transmits the random access
Msg1 to the uplink paired with the downlink where the
synchronization signal block is received, the terminal explicitly
informs the base station of the supplementary uplink capability
using the Msg1, the Msg3, or the Msg5. If the base station acquires
the supplementary uplink capability of the terminal based on the
Msg1, the base station may determine the uplink primary component
carrier and inform the terminal of the determined result using the
Msg2 (or Msg4).
FIG. 12 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure.
Referring to FIG. 12, the base station may receive the Msg1
including the random access preamble from the terminal at operation
1210. In this case, the Msg1 may include information on the
supplementary uplink capability of the terminal, and the base
station may check the supplementary uplink capability of the
terminal.
Therefore, the base station may transmit the uplink primary
component carrier configuration information to the terminal in the
Msg2 or the Msg4 based on the supplementary uplink capability of
the terminal at operation 1220.
Here, the base station may acquire the supplementary uplink
capability of the terminal based on the Msg3. In such a case, the
base station may determine the uplink primary component carrier and
inform the terminal of the determined result using the Msg4.
FIG. 13 is a flowchart illustrating a method by a base station for
configuring the uplink primary component carrier, according to one
embodiment of present disclosure.
Referring to FIG. 13, the base station may receive the Msg3 from
the terminal and may check the supplementary uplink capability of
the terminal at operation 1310.
Then, the base station may transmit the uplink primary component
carrier configuration information to the terminal in the Msg4 based
on the supplementary uplink capability of the terminal at operation
1320.
FIG. 14 is a flowchart illustrating a method by a terminal for
transmitting uplink data in a wireless communication system
according to an embodiment of the disclosure.
Referring to FIG. 14, the terminal receives downlink control
information for scheduling of uplink transmission in a cell from a
base station at operation 1410. As described above, the downlink
control information may include an indicator indicating whether the
scheduling of the uplink transmission is associated with a
supplementary uplink in the cell. The indicator may be transmitted
in 1 bit to indicate whether or not to be scheduled for the
supplementary uplink. If the supplementary uplink is not configured
for the terminal in a cell, the indicator may be not configured,
i.e., the indicator may be configured with zero (0) bit.
The terminal determines whether to transmit the uplink data on the
supplementary uplink or a non-supplementary uplink (e.g., a primary
component carrier uplink, a secondary component carrier uplink)
based on the indicator, and transmits the uplink data on the
supplementary uplink or the non-supplementary uplink based on the
determination at operation 1420. Specifically, if the indicator
indicates that the scheduling of the uplink transmission is
associated with the supplementary uplink, the terminal determines
to transmit the uplink data on the supplementary uplink. Or, if the
indicator indicates that the scheduling of the uplink transmission
is associated with the non-supplementary uplink, the terminal
determines to transmit the uplink data on the non-supplementary
uplink.
FIG. 15 is a flowchart illustrating a method by a base station for
receiving uplink data in a wireless communication system according
to an embodiment of the disclosure.
Referring to FIG. 15, the base station transmits downlink control
information for scheduling of uplink transmission in a cell to a
terminal at operation 1510. As described above, the base station
may configure and transmit an indicator in the downlink control
information to indicate whether the scheduling of the uplink
transmission is associated with a supplementary uplink in the
cell.
The base station receives the uplink data at operation 1520. If the
base station transmits the downlink control information including
the indicator indicating that the scheduling of the uplink
transmission is associated with the supplementary uplink, the
uplink data is received on the supplementary uplink. If the base
station transmits the downlink control information including the
indicator indicating that the scheduling of the uplink transmission
is associated with a non-supplementary uplink in the cell, the
uplink data is received on the non-supplementary uplink.
FIG. 16 is a block diagram of a terminal according to an embodiment
of the disclosure.
Referring to FIG. 16, the terminal includes a transceiver 1610 and
a controller 1630. The transceiver 1610 and the controller 1630 are
configured to perform the above described operations of the
terminal. Although the transceiver 1610 and the controller 1630 are
shown as separate entities, they may be realized as a single entity
like a single chip. The transceiver 1610 and the controller 1630
may be electrically connected to or coupled with each other.
The transceiver 1610 may transmit and receive signals to and from
other network entities, e.g., a base station.
The controller 1630 may control the terminal to perform a function
according to one of the embodiments described above. For example,
the controller 1630 may be configured to control the transceiver
1610 to receive downlink control information for scheduling of
uplink transmission in a cell from a terminal, to determine whether
to transmit the uplink data on the supplementary uplink or a
non-supplementary uplink based on the indicator, and to control the
transceiver 1610 to transmit the uplink data on the supplementary
uplink or the non-supplementary uplink based on the determination.
In addition, the controller 1630 may be configured to control the
transceiver 1610 to receive RACH configuration information for the
supplementary uplink from the base station in system information,
to determine whether to perform a RA procedure on the supplementary
uplink, and to control the transceiver 1610 to transmit a RA
preamble to the base station on the supplementary uplink if the RA
procedure is determined to be performed on the supplementary
uplink. The controller 1630 may refer to a circuitry, an ASIC, or
at least one processor.
FIG. 17 is a block diagram of a base station according to an
embodiment of the disclosure.
Referring to FIG. 17, a base station includes a transceiver 1710
and a controller 1730. The transceiver 1710 and the controller 1730
are configured to perform the above described operations of the
network (e.g., gNB). Although the transceiver 1710 and the
controller 1730 are shown as separate entities, they may be
realized as a single entity like a single chip. The transceiver
1710 and the controller 1730 may be electrically connected to or
coupled with each other.
The transceiver 1710 may transmit and receive signals to and from
other network entities, e.g., a terminal.
The controller 1730 may control the base station to perform a
function according to one of the embodiments described above. For
example, the controller 1730 may be configured to control the
transceiver 1710 to transmit downlink control information for
scheduling of uplink transmission in a cell to the terminal and
receive the uplink data from the terminal on a supplementary uplink
or a non-supplementary uplink in the cell. If the base station
transmits the downlink control information including an indicator
indicating that the scheduling of the uplink transmission is
associated with the supplementary uplink, the uplink data is
received on the supplementary uplink. If the base station transmits
the downlink control information including an indicator indicating
that the scheduling of the uplink transmission is associated with
the non-supplementary uplink, the uplink data is received on the
non-supplementary uplink. In addition, the controller 1730 may be
configured to control the transceiver 1710 to transmit RACH
configuration information for the supplementary uplink to terminal
in system information and receive a RA preamble from the terminal
on the supplementary uplink if the RA procedure is determined to be
performed on the supplementary uplink. The controller 1730 may
refer to a circuitry, an ASIC, or at least one processor.
Meanwhile, the embodiments of the present disclosure disclosed in
the present specification and the accompanying drawings have been
provided only as specific examples in order to assist in
understanding the present disclosure and do not limit the scope of
the present disclosure. Therefore, it is to be understood that in
addition to the various embodiments of the present disclosure
described herein, all the changed or modified forms derived from
the technical spirit of the present disclosure are included in the
scope of the present disclosure.
Although the present disclosure has been described with various
embodiments, various changes and modifications may be suggested to
one skilled in the art. It is intended that the present disclosure
encompass such changes and modifications as fall within the scope
of the appended claims.
* * * * *